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Note 3 - Leases (Details Textual) |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 20, 2025 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Dec. 01, 2022 | Nov. 22, 2022 ft² | Apr. 27, 2021 ft²
Finance Lease, Right-of-Use Asset, Amortization |  | $ 7,000 | $ 31,000 | $ 69,000 | $ 94,000 |  |  |
Operating Lease, Payments |  | 43,000 | 41,000 | 128,000 | 124,000 |  |  |
Finance Lease, Principal Payments |  | $ 9,000 | $ 45,000 | $ 87,000 | $ 136,000 |  |  |
Austin, Texas [Member] | Research And Development Facility [Member] |  |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  |  |  | 5,960
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  |  |  |  | 36 months
Austin, Texas [Member] | Subleased Facility [Member] |  |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  |  | 3,900 |
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  |  | 29 months |  |
Austin, Texas [Member] | Donley Facilities [Member] |  |  |  |  |  |  |  |
Operating Lease, Monthly Rent | $ 14,186 |  |  |  |  |  |  |

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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-5 + Details
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